Astronomy

  1. Observational Astronomy
    1. The Electromagnetic Spectrum
      1. Nature of Light
        1. Wave Properties
          1. Particle Properties
            1. Wave-Particle Duality
              1. Photons
              2. Properties of Electromagnetic Radiation
                1. Wavelength
                  1. Frequency
                    1. Energy
                      1. Speed of Light
                        1. Relationship Between Properties
                        2. Spectrum Regions
                          1. Radio Waves
                            1. Microwaves
                              1. Infrared
                                1. Visible Light
                                  1. Ultraviolet
                                    1. X-rays
                                      1. Gamma Rays
                                      2. Atmospheric Effects
                                        1. Atmospheric Windows
                                          1. Absorption and Scattering
                                            1. Seeing and Turbulence
                                              1. Light Pollution
                                            2. Telescopes and Instrumentation
                                              1. Optical Telescopes
                                                1. Refracting Telescopes
                                                  1. Basic Design
                                                    1. Chromatic Aberration
                                                      1. Achromatic Lenses
                                                      2. Reflecting Telescopes
                                                        1. Newtonian Design
                                                          1. Cassegrain Design
                                                            1. Schmidt-Cassegrain
                                                              1. Ritchey-Chrétien
                                                              2. Telescope Properties
                                                                1. Aperture
                                                                  1. Focal Length
                                                                    1. Focal Ratio
                                                                      1. Resolution
                                                                        1. Light-Gathering Power
                                                                          1. Magnification
                                                                          2. Telescope Mounts
                                                                            1. Altazimuth Mounts
                                                                              1. Equatorial Mounts
                                                                                1. Computerized Tracking
                                                                              2. Radio Telescopes
                                                                                1. Single-Dish Telescopes
                                                                                  1. Interferometry
                                                                                    1. Very Long Baseline Interferometry
                                                                                      1. Arrays and Networks
                                                                                      2. Radio Astronomy Techniques
                                                                                      3. Space-Based Observatories
                                                                                        1. Advantages of Space Observations
                                                                                          1. Hubble Space Telescope
                                                                                            1. Spitzer Space Telescope
                                                                                              1. James Webb Space Telescope
                                                                                                1. Chandra X-ray Observatory
                                                                                                  1. Fermi Gamma-ray Space Telescope
                                                                                                    1. Kepler Space Telescope
                                                                                                    2. Detectors and Instruments
                                                                                                      1. Photographic Plates
                                                                                                        1. Charge-Coupled Devices
                                                                                                          1. Complementary Metal-Oxide Semiconductors
                                                                                                            1. Photomultiplier Tubes
                                                                                                              1. Spectrographs
                                                                                                                1. Photometers
                                                                                                                  1. Adaptive Optics
                                                                                                                    1. Coronagraphs
                                                                                                                  2. Observational Techniques
                                                                                                                    1. Spectroscopy
                                                                                                                      1. Types of Spectra
                                                                                                                        1. Continuous Spectrum
                                                                                                                          1. Emission Spectrum
                                                                                                                            1. Absorption Spectrum
                                                                                                                            2. Spectral Line Formation
                                                                                                                              1. Element Identification
                                                                                                                                1. Doppler Effect
                                                                                                                                  1. Radial Velocity
                                                                                                                                    1. Redshift and Blueshift
                                                                                                                                      1. Cosmological Redshift
                                                                                                                                      2. Stellar Classification
                                                                                                                                        1. Spectral Types
                                                                                                                                          1. Luminosity Classes
                                                                                                                                        2. Photometry
                                                                                                                                          1. Magnitude System
                                                                                                                                            1. Apparent Magnitude
                                                                                                                                              1. Absolute Magnitude
                                                                                                                                                1. Distance Modulus
                                                                                                                                                2. Color Indices
                                                                                                                                                  1. Filter Systems
                                                                                                                                                    1. Variable Star Monitoring
                                                                                                                                                    2. Astrometry
                                                                                                                                                      1. Position Measurements
                                                                                                                                                        1. Parallax
                                                                                                                                                          1. Trigonometric Parallax
                                                                                                                                                            1. Statistical Parallax
                                                                                                                                                            2. Proper Motion
                                                                                                                                                              1. Star Catalogs
                                                                                                                                                                1. Space Astrometry Missions
                                                                                                                                                                2. Time-Domain Astronomy
                                                                                                                                                                  1. Variable Stars
                                                                                                                                                                    1. Transient Events
                                                                                                                                                                      1. Survey Telescopes
                                                                                                                                                                        1. Data Mining Techniques
                                                                                                                                                                        2. Citizen Science
                                                                                                                                                                          1. Amateur Contributions
                                                                                                                                                                            1. Visual Observing
                                                                                                                                                                              1. Astrophotography
                                                                                                                                                                                1. Data Analysis Projects

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                                                                                                                                                                            1. Foundations of Astronomy

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                                                                                                                                                                            3. The Solar System